Top 5 Linux Monitoring Tools Every Ops Engineer Should Use
This article introduces five essential Linux monitoring tools—iotop, htop, IPTraf, Monit, and related resources—explaining how each helps operations engineers diagnose I/O, CPU, memory, and network issues in real time without a GUI, and offers guidance on installation and practical use cases.
As an operations developer, understanding the underlying OS state is crucial; real‑time monitoring data helps diagnose performance issues.
1. iotop
Use iotop to see which processes consume I/O resources; it shows per‑process I/O usage and helps identify disk‑IO bottlenecks. It is not suited for benchmarking; for that consider fio (https://fio.readthedocs.io/en/latest/fio_doc.html).
2. htop
htop provides a colorful, interactive view of CPU, memory, and process information, making it easier than top to spot high‑CPU usage and memory consumption.
3. IPTraf
IPTraf is a lightweight, menu‑driven network traffic monitor that can filter by interface or TCP port, similar to Wireshark but without a GUI.
Useful URLs: http://iptraf.seul.org/ and https://www.wireshark.org/.
4. Monit
Monit is a flexible, free monitoring tool that can watch processes, ports, files, and trigger alerts; it also offers a lightweight web interface to view service status.
More info: https://mmonit.com/.
5. Conclusion
These Linux monitoring tools help quickly and accurately diagnose system anomalies, whether managing a single server or a cluster.
Extended reading: https://medium.com/better-programming/4-linux-monitoring-tools-you-should-use-38a136e68639
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